Home
Back
IQ Formula:
| From: | To: |
The IQ (Intelligence Quotient) formula calculates a person's intelligence score based on their mental age (MA) and chronological age (CA). It was originally developed by William Stern and later popularized by Lewis Terman.
The calculator uses the IQ formula:
Where:
Example Calculation: If a 10-year-old child (CA = 10) performs at the level of a 12-year-old (MA = 12), their IQ would be (12/10) × 100 = 120.
Details: IQ scores provide a standardized way to assess cognitive abilities compared to peers of the same age group. They are used in educational settings, psychological assessments, and research.
Tips: Enter mental age and chronological age in years. Both values must be positive numbers. The calculator will compute the IQ score.
Q1: What is considered an average IQ score?
A: The average IQ score is 100, with most people (about 68%) scoring between 85 and 115.
Q2: Can adults use this formula?
A: While the formula works mathematically for adults, modern IQ tests use different methods for adults as mental age concepts are less meaningful after adolescence.
Q3: What are the limitations of this formula?
A: It oversimplifies intelligence as a single number and doesn't account for different types of intelligence. Modern IQ tests use more sophisticated scoring methods.
Q4: How accurate is this calculation?
A: This provides a basic estimate but professional IQ tests use standardized tests with more comprehensive scoring systems.
Q5: What's the highest possible IQ with this formula?
A: There's no theoretical maximum, but scores above 145 are generally considered genius level.
Example 1: A 8-year-old with mental age of 10: IQ = (10/8) × 100 = 125
Example 2: A 15-year-old with mental age of 15: IQ = (15/15) × 100 = 100
Example 3: A 6-year-old with mental age of 9: IQ = (9/6) × 100 = 150